/* *****************************************************************************
 The Open Java Unified Mapping Platform (OpenJUMP) is an extensible, interactive
 GUI for visualizing and manipulating spatial features with geometry and
 attributes. 

 Copyright (C) 2009 Michaël Michaud

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 For more information see:
 
 http://openjump.org/

 ******************************************************************************/

package org.openjump.core.ui.swing.factory.field;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComponent;
import com.vividsolutions.jump.workbench.WorkbenchContext;
import org.openjump.core.ui.swing.ComboBoxComponentPanel;
import org.openjump.swing.factory.field.FieldComponentFactory;
import org.openjump.swing.listener.ValueChangeEvent;
import org.openjump.swing.listener.ValueChangeListener;

/**
 * Factory to build a combobox component. 
 * @author Michael Michaud
 * @version 0.1.0
 */
public class ComboBoxFieldComponentFactory implements FieldComponentFactory {

    private WorkbenchContext workbenchContext;
    private String option;
    private Object[] items;

    public ComboBoxFieldComponentFactory(final WorkbenchContext workbenchContext) {
        this.workbenchContext = workbenchContext;
    }

    public ComboBoxFieldComponentFactory(final WorkbenchContext workbenchContext,
        final String option, final Object[] items) {
        this.workbenchContext = workbenchContext;
        this.option = option;
        this.items = items;
    }

    public Object getValue(final JComponent component) {
        if (component instanceof ComboBoxComponentPanel) {
            ComboBoxComponentPanel chooser = (ComboBoxComponentPanel)component;
            return chooser.getSelectedItem();
        }
        return null;
    }

    public void setValue(JComponent component, Object value) {
        if (component instanceof ComboBoxComponentPanel) {
            ComboBoxComponentPanel chooser = (ComboBoxComponentPanel)component;
            if (value != null) {
                chooser.getComboBox().setSelectedItem(value);
            }
        }
    }

    public JComponent createComponent() {
        ComboBoxComponentPanel chooser = new ComboBoxComponentPanel(
            option,
            items,
            workbenchContext.getErrorHandler());
        return chooser;
    }

    public JComponent createComponent(final ValueChangeListener listener) {
        final ComboBoxComponentPanel chooser = new ComboBoxComponentPanel(
            option,
            items,
            workbenchContext.getErrorHandler());
        chooser.getComboBox().addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Object item = chooser.getSelectedItem();
                listener.valueChanged(new ValueChangeEvent(chooser, item));
            }
        });
        return chooser;
    }

}